Mercedes-Benz GLS 2020 Operator's Manual page 520

518 Display messages and warning/indicator lamps
Display messages Possible causes/consequences and
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* The coolant is too hot.
Coolant Too Hot Stop Vehi-
cle Turn Engine Off
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* The fan motor is faulty.
Add coolant ( page 426).
/
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Have the cooling system checked at a qualified specialist workshop.
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Stop the vehicle immediately in accordance with the traffic conditions and switch off the engine.
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& WARNING Danger of burns when opening the hood
If you open the hood when the engine has overheated or during a fire in the engine compartment, you could
come into contact with hot gases or other escaping operating fluids.
Before opening the hood, allow the engine to cool down.
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In the event of a fire in the engine compartment, keep the hood closed and call the fire service.
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Wait until the engine has cooled down.
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Make sure that the air supply to the radiator is not impaired.
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Avoiding high loads on the engine, drive to the nearest qualified specialist workshop. In doing so, ensure that
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the coolant temperature display remains below the red marking.
Avoiding high loads on the engine, drive to the nearest qualified specialist workshop. In doing so, ensure that
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the coolant temperature display remains below the red marking.
M M Solutions